Power transmission



June 11, 1935.

- W. H. FURNESS 3 POWER TRANSMISSION Filed Aug; 15, 1934 2' Sheets-Sheet 1' I N VEN TOR.

7% ATTORNEYJ' June 11, 1935. w. H. FURNESS POWER TRANSMISSION Filed Aug. l5, 1954 2 Sheets-Sheet 2 I N VEN TOR.

MIN/M I ATTORNEYJ' Patented June 11, 1935 rowan TnANsMIssIon-f -William H. Furness,JRLiverton, J1, assignor to American Rayon. Company,

nc., I Riverton,

N. J., a corporation of New Jersey p V V I p Application August 15, 1934, SeriallNo; 739,883 5 l t ,7 Claims. (o1 ..7 4; 63

- This invention relates tov power transmission devices and it has for its primary object'the'iprovision of a simple and economical transmission or drive capable of a very wide range of adjustment or accommodation, rendering it useful for a variety of purposes.

In Figures 1 to S inclusive of the drawings I have shown my invention as applied to a drill while in Figure 9 I have illustrated it as applied to line shafting.

Referring now to the drawings:

Figure 1 is a bottom plan view of a drill embodying my drive;

Figure 2 is a side elevation and partial section of the drill;

Figure 3 is a section taken on the line 3-3 of Figure 2;

Figures 4 to 7 inclusive are small scale diagrammatic views illustrating the manner in which the device operates;

Figure 8 is a view corresponding to Figure 1 but illustrating how the device may be adjusted; and

Figure 9 is a view showing how the drive may be employed in line shafting.

On reference to Figures 1 and 2 it will be seen that the reference numeral 1 indicates a drive shaft having a suitable bearing 8. Pinned or otherwise secured to the end of the drive shaft 1 is a plate H3 provided with a boss 9 for this purpose. The plate Hl has a plurality of parallel teeth ll running across the face thereof. These teeth are preferably square in cross section. Swiveled on the turned down portion 8' of the bearing 8 is an arm l2 which may be adjusted through 360 and secured in any position of adjustment as, for example, by the member l3. It will, of course, be understood that the bearing 8 is non-rotatable. The free end of the arm extends well beyond the plate Ill and has a bar l4 slidably mounted therein for movement toward and from the axis of rotation of the plate Ill. The bar IE has swiveled in its inner end the sleeve I 5 having a yoke I5 adapted to slidably fit a rack bar IS the teeth of which engage with the teeth ll of the plate. The sleeve i5 is mounted in a socket IT on the end of the bar [4 and a drill I8 is pinned or otherwise detachably secured to the sleeve 15. The position of the bar I4 is adjustably fixed by the member l9.

The operation of the device is as follows:

The drive shaft 1 is driven from any suitable source of power and as it rotates it causes the plate in to rotate therewith. The rack bar N5, of course, moves with the plate Ill as the latter rotates and, therefore, the angular position of the rack :bar isconstantly'changing. To illustrate, 7':

in Figure; 4: the-plate- 0' hasbeen rotated 45"and the position of. the: bar will be as shown, in Fig ure .5 the plate :has' been 'rotatedi in Figure 46 it has been rotated and in Figure 7 it has As this occurs, however, the yoke I5 slides on the bar I6, but since it engages the side faces of the bar I6, the yoke I5 is caused to rotate as the angular position of the bar'changes. This imparts rotary movement to the drill I8, giving a one-to-one drive as between the drive shaft 1 and the drill I8.

It will be seen that therack bar It may be adjusted to any position from near the edge of the plate all the way into the center and depending upon the length of the bar Hi, all the way to near the opposite edge of the plate. The position of the drill l8 may, therefore, be changed in position in a direction lengthwise of the teeth II. By loosening the member l3 and adjusting the arm I2 the position of the drill Hi can be changed through 360 annularly of the plate. (See Fig. 8.) I have thus provided a compound adjustment which will enable me; to' spot the drill l8 at any point over the entire central area of the plate I0. I thus have a very simple drive having an infinite capacity for adjustment within the limitations of size and no change or substitution in parts is required. The advantages of this in a drill will be readily appreciated by those skilled in the art.

It will also be noted that the drive is a reversible one and will give a one-to-one drive in the reverse direction irrespective of the position of the member I8 with reference to the center of the plate It]. Advantage of this feature of my invention may be taken in a number of ways as for example, in line shafting where it is desired to get around an obstruction such as a post or column or the like. I have illustrated this in Figure 9 wherein 20 and H are two lengths of shafting each having a plate l 0 at adjacent ends. An ofiset shaft 22 has at each end a sleeve IS with yoke I5 for slidably engaging the rack bars it. A one-to-one' drive between the shafts 2G and 2! is thus secured. I am aware that gear drives have been employed to get around obstructions but it will be noted that by my invention the same drive can be utilized in a variety of varying applications whereas with a gear drive a special set of parts would have to be provided for each peculiar set of conditions.

I claim:--

1. In a power transmission, a revoluble plate having parallel teeth extending in a direction across a face thereof, a rack bar engaging said teeth, and a revolubly mounted yoke slidably engaging the rack bar.

2. In a power transmission, a revoluble plate havin parallel teeth extendingin a direction acrossa face thereof, a rack bar engaging said teeth, a yoke slidably engaging the rack bar, and

a mounting for the yoke adjustable with respect.

to the axis of rotation of the plate.

3. ma power transmission, a revoluble plate having parallel teeth extending in a direction across a face thereof, a rack barsengaging said teeth, a yoke slidably engaging the rack bar,

and a mounting for the yoke adjustable radially with respect to the axis ofrotation of the -plate.'

4. In a power transmission, a revoluble plate having parallel teeth extending in a directio'n across a face thereof, a rack bar engaging said teeth, a yoke slidably engaging therack bar, and a mounting. for the yoke. adjustable circumferentially. with respect to the axis of'rotation of the plate. p v

"justably mounted on the bearing, a bar carried in=the arm for adjustment toward and from the axis of rotation of the plate, and a member swivelled in the bar and slidably engaging the shoe,

said member being adapted to non-rotatively receive another member. 7 Ina power'transmission, a pair of shafts, and adrive connection therebetween including a plate with parallel teeth, a rack bar engaging the teeth, and a yoke slidably engagingthe bar and mounted for rotation.

r WILLIAM H. FURNESS. 

